I'm actually a bigger fan of the location out on Horizon Ridge...but wow that's a hike.
You don't go to Half Shell for the food. It's OK, but there's better seafood in Vegas.
What you go to Half Shell for is the killer patios which overlook Las Vegas. These views were soooo awesome before they put the patio covers up last year, but even still, it's still great. The patio features a bar, plenty of seating, a huge firepit and a big projection screen...not that you'll be watching it. The view of the city is magnetic.
Staff tend to be very nice and prompt. Overall, Half Shell always manages to feel very low-key and local, although the odd group of office birthday celebrateurs or conventioneers occasionally infiltrate. Oh well, nothings perfect.